@lordobito my D2 also applied from out of state. For CSU Northridge you will need a minimum eligibility index of 3502 to be considered. Go on the CSU Mentor website to figure out how to calculate your eligibility index:
https://secure.csumentor.edu/planning/high_school/eligibility_index.asp
On the application, you will self report your GPA (using courses from 10th grade on). You will be able to add extra points for honors and AP courses. Otherwise you will need to follow the standard 4.0 grading system (a = 4, b = 3, etc.) in your calculation.
You will be asked to send actual transcripts once your mid-year senior year grades are available.
The application period closes Nov. 30 so don’t delay getting your application and test scores submitted.
One more tip: depending on your major, some of the programs are highly competitive and require supplemental material. Here is the list:
http://www.csun.edu/admissions-records/freshman-impaction#major
Good luck!